Jane Yolen is the author of more than 300 books, including children's classics such as Owl Moon and The Devi's Arithmetic, and adult novels such as Sister Light, Sister Dark. Her books and stories have won the Nebula Award, the Caldecott Medal, the National Jewish Book Award, and many other awards and accolades. She divides her time between Massachusetts and St. Andrews, Scotland.

Robert J. Harris was born in Dundee and studied at the University of St. Andrews where he graduated with a first class honours degree in Latin. He is the designer of the bestselling fantasy board game Talisman and has written numerous books, including the popular World Goes Loki series, the Artie Conan Doyle Mysteries, as well as the bestselling The Thirty-One Kings and Castle Macnab. He lives in St. Andrews with his wife, Debbie.